CN105153910A - Preparing method for water-based strippable paint with modified silicon sol - Google Patents
Preparing method for water-based strippable paint with modified silicon sol Download PDFInfo
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- CN105153910A CN105153910A CN201510620686.9A CN201510620686A CN105153910A CN 105153910 A CN105153910 A CN 105153910A CN 201510620686 A CN201510620686 A CN 201510620686A CN 105153910 A CN105153910 A CN 105153910A
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Abstract
The invention relates to a preparing method for water-based strippable paint with modified silicon sol and belongs to the field of paint preparing. The method comprises the steps that a silane coupling agent is dissolved in absolute ethyl alcohol and then added into alkaline silicon sol to modify the alkaline silicon sol, then the modified silicon sol and polyurethane emulsion are mixed according to a certain proportion, then a series of additives are added, and the water-based strippable paint with the modified silicon sol can be prepared after stirring and ageing are carried out. The prepared water-based strippable paint is stable in performance and can be completely stripped off as long as the thickness of a dry film is smaller than 0.1mm, the needed stripping thickness is smaller than that of like products on the market, the paint is saved, the tensile strength and the elongation at break of the film are high, and performance is superior to that of the like products.
Description
Technical field
The present invention relates to a kind of preparation method of modified silicasol water-based Stripable paint, belong to coating preparation field.
Background technology
Steel, component and plant and instrument are in the process of transport and storage, and being easily subject to from many-sided erosion such as acid rain, steam, greasy dirt, microorganism and people is scratch, make the infringement that its surface is subject in various degree, reduction of service life.General anticorrosive measure has the methods such as brush paint, thermospray.If desired remove paint film in use, usually utilize organic solvent dissolution paint film, even direct instrument scrapes off.Such method not only will spend manpower and materials, and paint film is difficult to eliminate, and even can damage substrate surface.If cover the provisional protective membrane of one deck at these materials or equipment surface, the erosion of extraneous undesirable element can be completely cut off, greatly reduce the generation of infringement.When material or equipment come into operation again, protective membrane can be peeled off in flakes, does not affect outward appearance and the performance of equipment.The generation of strippable protective coating meets the demand of this respect.This new coating production technique is simple, easy construction, adopts the method films such as spraying, brushing, therefore can be used on baroque workpiece.
The inorganic polymer of silicon sol to be a kind of with water be disperse phase gathers metasilicic acid colloidal solution, silicon sol has the general characteristic of nano material, as surface and interface effect, macro quanta tunnel effect and volume effect etc., therefore can show outstanding than traditional material in the performances such as chemical property, mechanical property, electric property, magnetic performance and optical property through silica sol modified or composite matrix material.The aqueous polyurethane coating of doping vario-property silicon sol, effectively can improve water tolerance, solvent resistance, antiblocking, thermotolerance, the hardness of film of film.
Summary of the invention
The technical problem that the present invention mainly solves: can the requirement of complete stripping to the protection of base material short period of time and film although meet for Stripable paint common at present, but the thickness that film reaches needed for good peeling effect is comparatively large, and the coating content that unit surface uses is more.In addition, the water tolerance of film is lower, the defects such as antiseptic property has much room for improvement, provide a kind of preparation method of modified silicasol water-based Stripable paint, the method is dissolved in dehydrated alcohol with silane coupling agent, join in alkaline silica sol and modification is carried out to it, after being mixed by a certain percentage with polyaminoester emulsion by modified silicasol afterwards, add a series of auxiliary agent, after stirring ageing, a kind of modified silicasol water-based Stripable paint can be obtained.This coating peeling effect is excellent, and coating thickness is starkly lower than common coating, cost-saving.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
(1) take 1 ~ 2g3-aminopropyl triethoxysilane, be dissolved in 50 ~ 100mL dehydrated alcohol, stir obtained coupling agent solution;
(2) measuring 300 ~ 400mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 200 ~ 300r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 30 ~ 40min;
(3) after being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 50 ~ 60 DEG C, after insulated and stirred 5 ~ 7h, still aging 12 ~ 18h, obtains modified silicasol;
(4) by above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 1 ~ 2h of 100 ~ 200r/min, to make it fully mix, obtained mixed emulsion;
(5) in 500mL beaker, 100 ~ 150mL distilled water is added, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 150 ~ 200r/min, and add 1 ~ 2g wetting dispersing agent, 0.5 ~ 1.5g defoamer and 0.2 ~ 1.2g thickening material while stirring wherein, continuing stirring at low speed 5 ~ 10min makes various auxiliary agent mix, and obtains mixed solution;
(6) in above-mentioned mixed solution, 5 ~ 15g talcum powder is added as mineral filler, on homogenizer, under the rotating speed of 500 ~ 600r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity to 200 ~ 300r/min afterwards, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue stirring 10 ~ 15min;
(7) finally beaker is put into water-bath, be warming up to 30 ~ 40 DEG C, add 2 ~ 5g flow agent and 5 ~ 10g stripper, slowly stir 10 ~ 15min with glass stick, a kind of modified silicasol water-based Stripable paint can be obtained.
Described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.
Described Ricinate is Sodium dodecylbenzene sulfonate.
Described defoamer is organic silicon modified by polyether.
Described thickening material is Vltra tears.
Described flow agent is polyvinyl alcohol.
Described stripper is polysiloxane.
Embody rule method of the present invention is: water-based Stripable paint the present invention obtained is applied to metal, plastics or painted surface by modes such as brushing, spraying or roller coating; film leaves standstill from dry under room temperature ventilated environment; surface drying time 20min ~ 35min; do solid work time 2h ~ 3h, after drying, namely form protective membrane.When this coating build is 0.08mm ~ 0.09mm, film average tensile strength reaches more than 10MPa, and average elongation at break reaches more than 350%, when needs are peeled off, wetting 3 ~ 5min after can peel off after spraying distilled water to it.
The invention has the beneficial effects as follows:
(1) the water-based Stripable paint stable performance prepared by the present invention, build is less than 0.1mm and gets final product complete stripping, than cover thickness needed for like product is low on the market, saves coating, film tensile strength and elongation at break higher, performance is better than like product.
(2) the water-based Stripable paint prepared by the present invention is with aqueous polyurethane emulsion and modified silicasol is composite according to a certain ratio forms, and use cheap mineral filler, therefore production cost is relatively low, improves the water tolerance of film, solvent resistance, antiblocking, thermotolerance and hardness of film simultaneously.
Embodiment
Take 1 ~ 2g3-aminopropyl triethoxysilane as coupling agent, be dissolved in 50 ~ 100mL dehydrated alcohol, stir obtained coupling agent solution; Measuring 300 ~ 400mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 200 ~ 300r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 30 ~ 40min; After being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 50 ~ 60 DEG C, after insulated and stirred 5 ~ 7h, still aging 12 ~ 18h, obtains modified silicasol; By above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 1 ~ 2h of 100 ~ 200r/min, to make it fully mix, obtained mixed emulsion; 100 ~ 150mL distilled water is added in 500mL beaker, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 150 ~ 200r/min, and add 1 ~ 2g wetting dispersing agent, 0.5 ~ 1.5g defoamer and 0.2 ~ 1.2g thickening material while stirring wherein, continuing stirring at low speed 5 ~ 10min makes various auxiliary agent mix, and obtains mixed solution; 5 ~ 15g talcum powder is added as mineral filler in above-mentioned mixed solution, on homogenizer, under the rotating speed of 500 ~ 600r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity to 200 ~ 300r/min afterwards, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue stirring 10 ~ 15min; Finally beaker is put into water-bath, be warming up to 30 ~ 40 DEG C, add 2 ~ 5g flow agent and 5 ~ 10g stripper, slowly stir 10 ~ 15min with sheet glass, a kind of modified silicasol water-based Stripable paint can be obtained.
Described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.Ricinate is Sodium dodecylbenzene sulfonate.Defoamer is organic silicon modified by polyether.Thickening material is Vltra tears.Flow agent is polyvinyl alcohol.Stripper is polysiloxane.
Example 1
Take 1g3-aminopropyl triethoxysilane as coupling agent, be dissolved in 50mL dehydrated alcohol, stir obtained coupling agent solution; Measuring 300mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 200r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 30min; After being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 50 DEG C, after insulated and stirred 5h, still aging 12h, obtains modified silicasol; By above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 1h of 100r/min, to make it fully mix, obtained mixed emulsion; 100mL distilled water is added in 500mL beaker, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 150r/min, and add 1g wetting dispersing agent, 0.5g defoamer and 0.2g thickening material while stirring wherein, continuing stirring at low speed 5min makes various auxiliary agent mix, and obtains mixed solution; 5g talcum powder is added as mineral filler in above-mentioned mixed solution, on homogenizer, under the rotating speed of 500r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity afterwards to 200r/min, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue to stir 10min; Finally beaker is put into water-bath, be warming up to 30 DEG C, add 2g flow agent and 5g stripper, slowly stir 10min with sheet glass, a kind of modified silicasol water-based Stripable paint can be obtained.
Described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.Ricinate is Sodium dodecylbenzene sulfonate.Defoamer is organic silicon modified by polyether.Thickening material is Vltra tears.Flow agent is polyvinyl alcohol.Stripper is polysiloxane.
Embody rule method of the present invention is: water-based Stripable paint the present invention obtained is applied to metal, plastics or painted surface by modes such as brushing, spraying or roller coating; film leaves standstill from dry under room temperature ventilated environment; surface drying time 20min; do solid work time 2h, after drying, namely form protective membrane.When this coating build is 0.08mm, film average tensile strength reaches 10.5MPa, and average elongation at break reaches 353%.
Example 2
Take 1.5g3-aminopropyl triethoxysilane as coupling agent, be dissolved in 80mL dehydrated alcohol, stir obtained coupling agent solution; Measuring 350mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 250r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 35min; After being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 55 DEG C, after insulated and stirred 6h, still aging 15h, obtains modified silicasol; By above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 1.5h of 150r/min, to make it fully mix, obtained mixed emulsion; 130mL distilled water is added in 500mL beaker, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 180r/min, and add 1.5g wetting dispersing agent, 1g defoamer and 0.8g thickening material while stirring wherein, continuing stirring at low speed 8min makes various auxiliary agent mix, and obtains mixed solution; 10g talcum powder is added as mineral filler in above-mentioned mixed solution, on homogenizer, under the rotating speed of 550r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity afterwards to 250r/min, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue to stir 13min; Finally beaker is put into water-bath, be warming up to 35 DEG C, add 3g flow agent and 8g stripper, slowly stir 13min with sheet glass, a kind of modified silicasol water-based Stripable paint can be obtained.
Described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.Ricinate is Sodium dodecylbenzene sulfonate.Defoamer is organic silicon modified by polyether.Thickening material is Vltra tears.Flow agent is polyvinyl alcohol.Stripper is polysiloxane.
Embody rule method of the present invention is: water-based Stripable paint the present invention obtained is applied to metal, plastics or painted surface by modes such as brushing, spraying or roller coating; film leaves standstill from dry under room temperature ventilated environment; surface drying time 30min; do solid work time 2.5h, after drying, namely form protective membrane.When this coating build is 0.08mm, film average tensile strength reaches 10.8MPa, and average elongation at break reaches 355%.
Example 3
Take 2g3-aminopropyl triethoxysilane as coupling agent, be dissolved in 100mL dehydrated alcohol, stir obtained coupling agent solution; Measuring 400mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 300r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 40min; After being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 60 DEG C, after insulated and stirred 7h, still aging 18h, obtains modified silicasol; By above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 2h of 200r/min, to make it fully mix, obtained mixed emulsion; 150mL distilled water is added in 500mL beaker, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 200r/min, and add 2g wetting dispersing agent, 1.5g defoamer and 1.2g thickening material while stirring wherein, continuing stirring at low speed 10min makes various auxiliary agent mix, and obtains mixed solution; 15g talcum powder is added as mineral filler in above-mentioned mixed solution, on homogenizer, under the rotating speed of 600r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity afterwards to 300r/min, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue to stir 15min; Finally beaker is put into water-bath, be warming up to 40 DEG C, add 5g flow agent and 10g stripper, slowly stir 15min with sheet glass, a kind of modified silicasol water-based Stripable paint can be obtained.
Described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.Ricinate is Sodium dodecylbenzene sulfonate.Defoamer is organic silicon modified by polyether.Thickening material is Vltra tears.Flow agent is polyvinyl alcohol.Stripper is polysiloxane.
Embody rule method of the present invention is: water-based Stripable paint the present invention obtained is applied to metal, plastics or painted surface by modes such as brushing, spraying or roller coating; film leaves standstill from dry under room temperature ventilated environment; surface drying time 35min; do solid work time 3h, after drying, namely form protective membrane.When this coating build is 0.09mm, film average tensile strength reaches 11MPa, and average elongation at break reaches 360%.
Claims (7)
1. a preparation method for modified silicasol water-based Stripable paint, is characterized in that concrete preparation process is:
(1) take 1 ~ 2g3-aminopropyl triethoxysilane, be dissolved in 50 ~ 100mL dehydrated alcohol, stir obtained coupling agent solution;
(2) measuring 300 ~ 400mL alkaline silica sol pours in the there-necked flask that reflux and agitator are housed, start agitator, stir with the rotating speed of 200 ~ 300r/min, under the state stirred, above-mentioned obtained coupling agent solution is dropwise joined in alkaline silica sol solution, control rate of addition and make it drip off in 30 ~ 40min;
(3) after being added dropwise to complete, there-necked flask is moved into water-bath, be warming up to 50 ~ 60 DEG C, after insulated and stirred 5 ~ 7h, still aging 12 ~ 18h, obtains modified silicasol;
(4) by above-mentioned obtained modified silicasol and polyaminoester emulsion by volume for 2:3 pours in 1000mL beaker, to be placed on magnetic stirrer with the rotating speed stirring at low speed 1 ~ 2h of 100 ~ 200r/min, to make it fully mix, obtained mixed emulsion;
(5) in 500mL beaker, 100 ~ 150mL distilled water is added, be placed on low rate mixing machine afterwards, with the rotating speed stirring at low speed of 150 ~ 200r/min, and add 1 ~ 2g wetting dispersing agent, 0.5 ~ 1.5g defoamer and 0.2 ~ 1.2g thickening material while stirring wherein, continuing stirring at low speed 5 ~ 10min makes various auxiliary agent mix, and obtains mixed solution;
(6) in above-mentioned mixed solution, 5 ~ 15g talcum powder is added as mineral filler, on homogenizer, under the rotating speed of 500 ~ 600r/min, high-speed stirring evenly obtains fillers dispersed liquid, reduce stirring velocity to 200 ~ 300r/min afterwards, above-mentioned obtained mixed emulsion is joined in fillers dispersed liquid, keeps rotating speed to continue stirring 10 ~ 15min;
(7) finally beaker is put into water-bath, be warming up to 30 ~ 40 DEG C, add 2 ~ 5g flow agent and 5 ~ 10g stripper, slowly stir 10 ~ 15min with glass stick, a kind of modified silicasol water-based Stripable paint can be obtained.
2. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described aqueous polyurethane emulsion is aliphatic polyurethane water dispersion.
3. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described Ricinate is Sodium dodecylbenzene sulfonate.
4. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described defoamer is organic silicon modified by polyether.
5. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described thickening material is Vltra tears.
6. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described flow agent is polyvinyl alcohol.
7. a kind of modified silicasol water-based Stripable paint according to claim 1, is characterized in that: described stripper is polysiloxane.
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Cited By (6)
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| CN106833342A (en) * | 2017-02-23 | 2017-06-13 | 国网山东省电力公司临沂供电公司 | A kind of preparation method of aqueous Stripable paint |
| CN106833319A (en) * | 2016-12-30 | 2017-06-13 | 深圳大学 | Waterborne, polycarbonate modified silicasol composite coating and preparation method thereof |
| CN106854355A (en) * | 2016-12-30 | 2017-06-16 | 深圳大学 | Waterborne, polycarbonate modified silicasol emulsion and preparation method thereof |
| CN109161243A (en) * | 2018-08-24 | 2019-01-08 | 广东鑫皇冠新材料有限公司 | A kind of strippable water-based paint and preparation method thereof |
| CN111234167A (en) * | 2020-04-03 | 2020-06-05 | 胡黎明 | Preparation method of high-stability organic silicon modified waterborne polyurethane |
| CN113801554A (en) * | 2020-06-16 | 2021-12-17 | 科思创德国股份有限公司 | Composition and preparation method and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833319A (en) * | 2016-12-30 | 2017-06-13 | 深圳大学 | Waterborne, polycarbonate modified silicasol composite coating and preparation method thereof |
| CN106854355A (en) * | 2016-12-30 | 2017-06-16 | 深圳大学 | Waterborne, polycarbonate modified silicasol emulsion and preparation method thereof |
| CN106854355B (en) * | 2016-12-30 | 2018-11-27 | 深圳大学 | Waterborne, polycarbonate modified silicasol lotion and preparation method thereof |
| CN106833319B (en) * | 2016-12-30 | 2019-05-21 | 深圳大学 | Waterborne, polycarbonate modified silicasol composite coating and preparation method thereof |
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| CN109161243A (en) * | 2018-08-24 | 2019-01-08 | 广东鑫皇冠新材料有限公司 | A kind of strippable water-based paint and preparation method thereof |
| CN111234167A (en) * | 2020-04-03 | 2020-06-05 | 胡黎明 | Preparation method of high-stability organic silicon modified waterborne polyurethane |
| CN112679696A (en) * | 2020-04-03 | 2021-04-20 | 胡黎明 | Preparation method of high-stability organosilicon modified waterborne polyurethane |
| CN112679695A (en) * | 2020-04-03 | 2021-04-20 | 胡黎明 | Preparation method of high-stability organic silicon modified waterborne polyurethane |
| CN113801554A (en) * | 2020-06-16 | 2021-12-17 | 科思创德国股份有限公司 | Composition and preparation method and application thereof |
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